Current Conveyor based Novel Gyrator filter for Biomedical Sensor Applications

Abstract

This paper presents a lossy gyrator, which is used to implement a universal second order current mode filter. The proposed lossy gyrator uses conventional Second Generation Positive Current Conveyor (CCII+) as a basic building block, which has −3 dB bandwidth of 230 MHz and a total power consumption of $15.31\ \mu \mathbf{W}$. A universal second order current mode filter is designed using proposed lossy gyrator, which achieves a high cutoff frequency of 18 Hz in low pass mode, a low cutoff frequency of 345 Hz for high pass, and a band pass response with resonating frequency at 90 Hz with a total power dissipation of $57\ \mu \mathbf{W}$. Simulation is done using standard 180 nm CMOS technology at ±0.5 V supply voltage.